Code Quiz
Jan 10, 2008, By Steven Owen
Excluding exceptions, which one of the following locations does not require GFCI protection for 15A and 20A, 125V single-phase receptacles?...
Code Quiz
Dec 27, 2007, By Steven Owen
For a 20A, 125V, single-phase receptacle that supplies power to a cord-and-plug connected metering pump, which is integral to a continuous industrial process that cannot tolerate an unexpected loss of power, installed outdoors in an industrial facility, the 20A receptacle...
Code Quiz
Dec 13, 2007, By Steven Owen
In a large electrical room with numerous pieces of equipment rated at 1,200A or more, the question has arisen as to whether panic hardware is or is not required on all of the personnel doors....
Code Quiz
Nov 27, 2007, By Steven Owen
What is the maximum allowable ampacity of a 10 AWG THHN or THWN-2 insulated conductor installed in a schedule 80 PVC raceway (90°C rated) installed underground from the branch-circuit panelboard to the luminaires installed for parking lot lighting?...
Code Quiz
Nov 13, 2007, By Steven Owen
When installing cable- or raceway-type wiring methods, installed in exposed or concealed locations under metal-corrugated sheet roof decking, the cable- or raceway-type wiring method shall be installed and supported so that the nearest outside surface of the cable or raceway is not less than 1½ inches from the nearest surface of the roof decking...
Code Quiz
Oct 26, 2007, By Steven Owen
A new service consisting of 6 individual disconnect switches has been installed outdoors, on the back side of a small retail shopping center...
Code Quiz
Oct 12, 2007, By Steven Owen
A cable tray system has been installed to support service entrance conductors. The service entrance conductors consist of six sets of three-conductor 500kcmil interlocked armored cables installed in parallel in a single layer in the tray. ...
Code Quiz
Sep 27, 2007, By Steven Owen
A 60-foot metal pole supporting luminaires is found to be deficient with respect to the 2005 version of the NEC. The installation consists of the following...
Code Quiz
Sep 13, 2007, By Steven Owen
According to the 2005 NEC (not any specific state or local code), when installing 2-foot by 4-foot fluorescent lay-in luminaires in suspended ceilings, how many corners of any one of the luminaires require an independent support wire to support it?...
Code Quiz
Aug 27, 2007, By Steven Owen
A construction site has 10 office trailers. Each unit is identical. The HVAC unit for each trailer has a motor-rated load current of 27A and a branch circuit selection current of 30A at 208VAC, 3-phase. What is the proper size for the ground-fault, short-circuit protective device for each HVAC unit?...
Code Quiz
Aug 13, 2007, By Steven Owen
What is the load on the service for 10 office trailers on a construction site? ...
Code Quiz
Jul 27, 2007, By Steven Owen
Disregarding exceptions, which enclosure is limited to 30-foot (maximum) extensions beyond the equipment it supplements?...
Code Quiz
Jul 13, 2007, By Steven Owen
When installing metal-armored cables and metal raceways, is it permissible to connect a metal-armored cable or a metal raceway to a nonmetallic box?...
Code Quiz
Jun 27, 2007, By Steven Owen
When installing a high-impedance grounded neutral system, for a 480V, 3-phase system, the following question has arisen. Which of the following choices best describes the proper routing for the grounded conductor of the system?...
Code Quiz
Jun 13, 2007, By Steven Owen
When installing a high-impedance grounded neutral system for a 480V, 3-phase electrical system, the following question arises. Where is the proper location for the grounding impedance (resistor)?...
Code Quiz
May 29, 2007, By Steven Owen
What is the minimum size and metal thickness required for a junction box constructed of sheet steel, with one 4-inch RMC conduit (per wall) connected on opposite walls of the box (i.e., directly across from one another)?...
Code Quiz
Nov 27, 2006, By Steven Owen
In a Class 1 location of a spray application (Art. 516) area, portable equipment such as portable electric lamps or other utilization equipment shall be permitted in which of the following situations?...
Code Quiz
Nov 13, 2006, By Steven Owen
The wiring of the emergency system in hospitals shall be mechanically protected. Where installed as branch circuits in patient care areas, the installation shall comply with the requirements of 517.13(A) and 517.13(B). Which of the following wiring methods is permitted?...
Code Quiz
Oct 25, 2006, By Steven Owen
What is the proper size overload, and branch-circuit, short-circuit, ground-fault protective device permitted for a hermetic compressor with a nameplate rated-load of 38A, and a branch-circuit selection current of 40A?...
Code Quiz
Oct 11, 2006, By Steven Owen
What is the proper size branch-circuit, short-circuit, ground-fault protective device required for a hermetic compressor with a nameplate rated load of 38A?...
Code Quiz
Sep 25, 2006, By Steven Owen
What is the minimum size XHHW insulated feeder conductor permitted for an industrial machine, which consists of the following loads? All terminals are rated at 75°C....
Code Quiz
Sep 8, 2006, By Steven Owen
What is the maximum allowable ampacity of 12 AWG THHN insulated conductors installed in a strut-type channel raceway that is 1½ inches by 1½ inches?...
